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math.CO2025
Excluding Pinched Spheres
Laure Morelle, Evangelos Protopapas, Dimitrios M. Thilikos +1
The pinched sphere is the pseudo-surface obtained by identifying two distinct points of the sphere. We provide a structural characterization of graphs exclud…
cs.DS2025
Graph modification of bounded size to minor-closed classes as fast as vertex deletion
Laure Morelle, Ignasi Sau, Dimitrios M. Thilikos
A replacement action is a function that maps each graph to a collection of graphs of size at most . Given a graph class , we consider a gener…